Outkast Troubleshooting

I've cleaned, lubed, and replaced the Orings on my Outkast but every time I plug a tank into the gun and shoot - it spurts like it's running out of air, like it's an automatic weapon.
I've tried both CO2 and HPA tanks. Yes - they were full.
Any help?

whats happening is the sear is failing to catch the hammer so its "jack-hammering" until it finally does. this can be due to a worn down sear on the trigger frame, or a worn down hammer/striker itself. Replace one or the other or both and the problem will go away.